So this month's SBCL will be quite exciting, in that it provides a framework for experimentation. Yes, we have a contrib/ directory, wherein things that aren't portable enough to go into a cross-vendor repository and yet aren't stable, documented or mature enough to be included as a supported extension, can live or die as determined by the user community (all two of you).

This can be viewed as a way of involving the users in the direction of the project, or as a way of punting on the difficult decisions. Be that as it may, as of Wednesday, SBCL users will be able to do

As well as an interface to the BSD socket API, and asdf itself, there is an implementation of rotate-byte, a hack to make pseudo-standalone executables, and a package that hooks in to the read-eval-print-loop to give a different interface.